Car Key Fob Repair - How to Get Back on the Road Even If Your Keyless Entry isn't Working
Key fobs can have issues with time, like the loss of functionality. Certain issues may require professional attention, but most can be resolved at home.
Changing the battery is often the first step. The majority of fobs have flat watch-style batteries that are easy to find in hardware stores or auto parts stores.
Dead Battery
It can be an incredibly problem when a key fob's battery is dead. This is especially true if you are away from home. There are ways to get back on the road if your car's keyless entry doesn't work.
The first thing to check is to see if the buttons on the key fob are working. If they do, then the problem may lie with the car's locks instead of the fob.
If your keys do not unlock, you may find an electronic slot in the trim around the door handles or in other places on your vehicle (consult the owner's manual). Insert the mechanical key, and try again. If this fails to unlock the door, some cars have an app that allows you to unlock it remotely. FordPass Connect, myChevrolet Mobile App and myMazda apps, for instance let owners unlock their doors using smartphones. However, car key immobiliser repair are subject to a monthly cost.
You should also check that your key fob does not take the car's battery away by being plugged into them. A dead key fob can drain your battery, particularly when you utilize its remote feature while watching TV or speaking on the phone.
Holding the key fob up to your car's start button could cause a key fob with low battery. It's a quick solution that could save you a trip to the dealer or even select Interstate All Battery Center locations.
You can also find out if your key fob is actually dead by trying it in another vehicle with the push-button ignition. If it's not working it's likely that the battery needs replacement. It's a good idea keep a spare key fob in your backpack or purse.
Damaged Buttons
It is possible that your key fob has a damaged button. Your key fob likely contains a circuit board with "contact pads" for each button, and these tiny pads are covered with a conductor of electricity that wears down over time. This wear could cause your device to respond slower or not at all.
The contact pad on a car keyfob can be easily replaced using a flathead screwdriver. If the case is damaged or badly smashed it may be difficult to open. You'll need to take it to an auto repair shop to repair the fob.
It's not uncommon for a key fob to be dropped on hard surfaces, walked on or exposed to water. All of these events can cause physical damage, including breaking and snapping keys.
It could also alter the internals of the fob which could result in an issue. This is why it's always a good idea to carry an extra key fob in your wallet or pocket in case you damage the one you own.
Make sure the battery is charged first If your key fob's buttons are not responding in the way they should. Key fobs do not require any special electronic device. They are powered by the same battery for two dollars that is used in hearing aids and watches. They are sold at drug, hardware, and online stores.
If the battery is good it is possible that the buttons are dirty or worn out. You can easily clean them with a damp cloth. If they're still not responding, test a different key fob to see whether the issue is with yours or a specific kind of car key fob. If the other key fob works it is possible that yours needs to be reset or replaced.
Reprogramming
The secret world of car key fobs is more complicated than the myths would suggest. Basic fobs operate on radio frequency signals specific to each car. The fobs must be properly programmed to allow unlocking and starting the vehicle. Unfortunately, reprogramming a fob isn't as easy as pressing a few buttons and with very few exceptions it has to be done by a dealer.
Check the owner's manual for more detailed instructions. Some manufacturers, such as Mercedes, use proprietary technology that guarantees only dealers can create a new fob and re-sync it with your vehicle. Some independent shops may offer this service, so check reviews and prices prior to selecting the right shop.
Some car models will erase other fobs when they're reprogrammed. This means you'll need to have additional fobs programmed by a professional. This is a costly proposition especially if you're only down to one functioning fob. Even if the mechanical key won't start the car, it's a good idea to have a backup that can open the trunk and doors.
Be prepared for a gruelling experience if you choose to reprogram your fob by yourself. There are many guides on the internet that promise success however, you're likely to be disappointed. Many of these guides are written by people with no knowledge of this field and are often based on unsubstantiated claims. Some of these guides claim that you can program your car key fob with just the click of a button. This is misleading.
The majority of key fobs are held in place by a clip made of plastic which is easy to remove, but the battery is inside the circuit board, so you'll have to carefully pry it out using a device. You should be able to locate the button battery. It's usually tiny batteries for a watch, which can be purchased at any pharmacies or at home improvement stores. Removing the battery is typically an easy process, but it's always worthwhile to try first before replacing the entire unit.
Replacement
If a car key fob is damaged or isn't functioning, it's important to know there are several ways to remedy the problem. An easy fix could be as simple as replacing the battery or changing the program on the key fob, but a more in-depth repair might be required. It is also helpful to keep a spare fob in case one is lost or stolen.
Most modern key fobs include the physical key in addition the electronic components, making them both pricier and more complex to replace than traditional keys. Some "smart fobs" include remote starters. As such, it's important to be aware that it could take up to an hour to have an alternative key fob cut and programmed for your vehicle.
Fobs make use of a tiny radio transmitter mounted on a circuit board to communicate with the car's receiver. Pressing the button triggers the transmitter, which sends an RF signal unique to the car's receiver. The receiver detects and compares the signal with preprogrammed codes. This allows a driver to start the vehicle from a distance without the need to insert the key in the ignition.
If your fob's buttons aren't working or responding in a sporadic manner, they may be damaged by water. You may be able to fix the fob by taking it apart and looking for any damaged or non-responsive buttons. If this doesn't resolve the issue, try reprogramming the fob or purchasing an entirely new fob.
You should check with a local auto dealer or a locksmith before purchasing a replacement keyfob online to make sure it is compatible with the security system of your vehicle. There are a variety of aftermarket key fobs available cheaper, but it's important to study the brands and read reviews before attempting to program them. Some fobs can be changed by an accredited locksmith, but other models require programming equipment that only a technician in the automotive industry or dealer is able to use.